Well-drilling device



J. B. WOOLDRIDGE. WELL DRILLING DEVICE. APPLICATION FILED DEC. 6. 1919.

1,376,302, Patented Apr 26,1921.

a W -\\BN XX 12v VENTOR A TTORIVEY" and us the same. reference belo hadbhe aofizl B. woowmno or KANSAS any, mssoom;

"WELZWDEZELLTENG' DEVICE.

hxpgz-lioatima 341ml 32102112 02: 6 Serial No. 842,901.

To all '20 loam may conoewn: 7

Be it lgnown that 1, Jo 1?: Ti 'oomamm, a citizen of Unite d tale?residing at Kansas City, in "clleoounfizy o: locks-01o 21ml State ofMissouri, have lover; :(l co ta aml useful Improvements 131 Devices; andI do clclaro the allowing 0 be a full, clear, and exact desomptlon theinvention, such as will enable omen in the art to which it appertalns tomake accompanying drawlngs and to tho lei ters and l tires of referencemarl-ted. thereon,

which :lorm a part of "this specification.

This invention relates to well drilling ma- .chinery and pa *iicula'rlyto a combined iirill and r-sa-mer fol simultaneously drilling andreaming wells.

0119501 objects of provide 5,21 i1 prevail clrlll and mommy may bereadily introrluceal through. ihe Well casing sections 25 topreliminarily cui- & hole less than the outer rliametei of the tube our}ioonlmgqo opening during the cutting opoz'ni'aion by oericaln umlermourners whim will proviilo an least equal to the outer (hamlets? of thewell casing, zmrl to so COIlSlJI'HC'l? drill it may be readilyint-rollucecljhmugh the seoolon s and removed toazelrom wlcbo'ut l1" liemuieron.

and anilinchn-ao sides to carry l hoaleclblocks 4; "and 5 which arecessos or cub-out gol'l'ozzs are mofti-ocl the l'eazzw axnri the bloolzsbeing Wfifl clkso zloo clined "walls of the unler mowers-mo 5m: 5mmention of 13.1%- Th lower and. will: a cyliifiival poi ion prowl 3inwl'lich or tools '8 2' in an? upwardly in- 50 the the invention is tois yroviacl legioycly threaded recoss 11 to receive the sham: 12 pi a;drill bit 3, carrying the comooltools 14 and 15 which arorotatablysecured f'shero to. The head lsulso provided Padhonteri Apr, 2%, 1921..

l'ss upper and with a oylindrically thread ecl portiori 3.6; uyozl whicha collar or coupllilg 17, may be tbreaded tojconnect the hal't 13%;?means ofwhicll the drill ma be lam ro'tatell, tl m 'hafi 18- receivingpower any sm h'zblo source.

ix ding axmlly through poris 19, navi gbranohes 205mg lubrica l.

21, by means of whioh lubricant can be sup plied: to the under reamerblocks 4 and' 5, one} the uppor en'cl oft-he head is connected to alubricant slipply conduit 22 'connected to any suitable source oflubricant supply. 'lfheblooks are shown a-s-havi'ng curved up er ends 23oncll l adjacent to the tools 8 a 9 the head i's 9:

so that the curved porhions reduce the liability of tho blocks beciomingweclgod the well casing When ll ,is desired to assemble the parts, filobit 13 may be screwed in its socket "11 and the blocks l and 5 may beintroduced into tho slots 2 ahrl 3 from the top so that illeymay fallby" opeawifiy to the bottoms-of the slots, 2 and 3,

The removable stop plates 2 and 3 are then secured to she top of thehead 1 with their outer elfis overlapping the floors of the grooves Qand, 3 so that the top ends of tho grooms, closed, 618263 11 preventingaooidental'displacement of the echo 4 ahd with respect to the head.

The oouplng 17 is then screwed onto the throaderl portion 16 and to theshaft 18 to couple the drill :0 the shaft. VThcm. the

coupling 1'? is place, it bears upon the stow plates 2 and 3 to holdthemin place. Joey the parts are assembled; theymay ho introduced intothe'well casing so thaftho bit {nools M and l5 may drill the bottom oftho well and as'tho drill proceeds into tho grenad tho "esnstance ofthefgroundhwill foxes the blog 4 and 5 upwardly and outword? so osgatooause the u der reamers to" ream oho sidel; chi-he well drilled by thetools anal 15 and enlarge the some too, size at loasl; equal to *theouter diameter of the tube or wall casing 25, anl the drilling may pro-(weal. until the proper depth has been reached, the under -hammersproviding an opening largo oough for the introduction of {the sectwns ofthe woll oasing. 0

When it is dammed ho wxthrlmw the dmll,

an upward pull on the shaft 18 will move the head 1 in an upward,vertical direction while the under reamer blocks will be drawn inwardlyby means of the slots 2 and 3 so that the outer edge of the blocks andtheir 7 under reamers 8 and 9 will not extend beyond the edges of thetools 1 t and 15, the withdrawal being sufiieient ,Lt-o permit the underreamers to be easily removed through the tube sections25. z

It will, therefore, be seen that thedrill is so constructed thatalthough it may be readily introduced to and removed from theters-Patent'is:

1. In a reamerand drill, a .rhtary head 'having' a. threaded upper endand provided with slotted, upwardly and outwardly inclined sides, theslots extending to points adjacent to the threaded upper end, rotaryunder-reamers slidably secured in said slots, the upward longitudmalmovement of the under-rearners being effective in extendving; theinradially with respect to the head so that they will ream a hole ofprogresslots.

sively' increasing diameter, a rod coupling receivable 'on the threadedend of the head, and'means closing'the upper ends of the 2. In a rotaryreamer and drill, a rotary head having upwardly and outwardly inrlinedsides pro vided with slots, blocks slidable in said slots, and'wotaryunder-reamers journaled'in the blocks, thegi pward and out ward movementotthe hloclis bifig efiectiyejn extending the upder-reamers radiallywith respect tothe head;

. 3. In a rotary reahier and drill, a rotary 'headihaving upward y andoutwardly inclined sides rovided with slots, blocks slidslots, rotaryunder-reamers mounted in the blocks, and springs in the n the bottom ofthe block and the other against the lower end of the slot to normallyexert pressure upwardly against thc hlocks to impart upward and outwardmovement thereto whereby the under-reamersmay ream a hole ofprogressively increasing diameter.

4. In a rotary reamer and drill, a head comprising. a member havingupwardly and outwardly inclined sides provided with slots open at theirupper ends, blocks slidahle in the slots, under-reamcrs rotatable in theblocks, the upward and outward movement of the blocks extending therotary. reamers radiallyto ream a hole of progressively increasingdiameter, and removable plates closing the upper ends of the slots.

5. In a rotary reamer and drill, a head comprising a member havingupwardly and outwardly inclined sides provided with slots, blocksslidahle insaid slots, rotary under-reamers carried by the blocks andhaving rotary movement, independent there of as the blocks rotatewith'the head, the upward movement of the blocks being eiiective inextending the rotary under-reainers radially with respect to the head sothat the rotary under-reamers will ream a hole of progressivelyincreasing diameter, means on one end of the member to receive a hitmounting, and a rod-engaging means on the other end of the member.

6. In a rotary reamer and drill, a reamer head, a rotary drill bit atthe lower en'd ot/ said head, said head having upwardly and outwardlyinclined sides provided with slots, longitudinally sli-dable blocks insaid slots, rotary under-reamerscarried by the blocks and having rotarymovement independent ofthe blocks as the blocks-are rotated with thehead whereby continuously changing cutting: faces are presented to theside of the well as the head rotates, the upper longitudinal movement ofthe blocks being effective in extending the rotary under-reamersradially with respect to the drill-and underreamcr' head so that therotary under-reamers will ream a hole of larger diameter than thatdrilled by the drill bit, and means for rotating said head. V y Intestimony whereofI aflix no signature.

' JOHN B. WGOL RIDGE,-

